Hi Ricardo,
Thank you for your response. I increased the trace level as advised
but didn't get any more useful information:
[27751.660199] uvcvideo: Probing generic UVC device 2
[27751.660306] uvcvideo: Found format YUV 4:2:2 (YUYV).
[27751.660310] uvcvideo: - 640x360 (15.0 fps)
[27751.660312] uvcvideo: - 1280x720 (2.0 fps)
[27751.660317] uvcvideo: Found a Status endpoint (addr 83).
[27751.660320] uvcvideo: Found UVC 1.00 device Linux for Tegra (0955:7020)
[27751.660327] uvcvideo: Added control
00000000-0000-0000-0000-000000000001/2 to device 2 entity 1
[27751.660428] uvcvideo: Failed to query (GET_INFO) UVC control 2 on
unit 1: -32 (exp. 1).
[27756.893967] uvcvideo: Adding mapping 'Exposure, Auto' to control
00000000-0000-0000-0000-000000000001/2.
[27756.893973] uvcvideo: Added control
00000000-0000-0000-0000-000000000101/2 to device 2 entity 2
[27762.013921] uvcvideo: Failed to query (GET_INFO) UVC control 2 on
unit 2: -110 (exp. 1).
[27762.013930] uvcvideo: Adding mapping 'Brightness' to control
00000000-0000-0000-0000-000000000101/2.
[27762.013934] uvcvideo: Scanning UVC chain: OT 3 <- PU 2 <- IT 1
[27762.013939] uvcvideo: Found a valid video chain (1 -> 3).
[27792.733672] uvcvideo: UVC non compliance - GET_DEF(PROBE) not
supported. Enabling workaround.
[27797.853646] uvcvideo: Failed to query (129) UVC probe control :
-110 (exp. 26).
[27797.853652] uvcvideo: Failed to initialize the device (-5).
In contrast, here is the log when UVC is successful (defined as first
function in the composite driver):
[27916.011570] uvcvideo: Probing generic UVC device 2
[27916.011666] uvcvideo: Found format YUV 4:2:2 (YUYV).
[27916.011669] uvcvideo: - 640x360 (15.0 fps)
[27916.011670] uvcvideo: - 1280x720 (2.0 fps)
[27916.011674] uvcvideo: Found a Status endpoint (addr 81).
[27916.011676] uvcvideo: Found UVC 1.00 device Linux for Tegra (0955:7020)
[27916.011681] uvcvideo: Added control
00000000-0000-0000-0000-000000000001/2 to device 2 entity 1
[27916.012026] uvcvideo: Adding mapping 'Exposure, Auto' to control
00000000-0000-0000-0000-000000000001/2.
[27916.012029] uvcvideo: Added control
00000000-0000-0000-0000-000000000101/2 to device 2 entity 2
[27916.012181] uvcvideo: Adding mapping 'Brightness' to control
00000000-0000-0000-0000-000000000101/2.
[27916.012183] uvcvideo: Scanning UVC chain: OT 3 <- PU 2 <- IT 1
[27916.012190] uvcvideo: Found a valid video chain (1 -> 3).
[27916.013757] uvcvideo: UVC device initialized.
I have also used usbmon since I've tried some USB sniffing tools to
try and figure out the problem. Please let me know of any more
comments or ideas.
Regards,
On Tue, Jun 14, 2022 at 3:39 PM Ricardo Ribalda <ribalda@xxxxxxxxxxxx> wrote:
>
> Hi Marisol
>
> Could you try increasing the trace level with:
>
> rmmod uvcvideo
> modprobe uvcvideo trace=0xffffffff
>
> And then connect your camera.
>
> That might give you a better idea of what is going on.
>
> You could also use usbmon to discard that there is a problem with the
> usb gadget.
>
> Regards!
>
> On Tue, 14 Jun 2022 at 23:31, Marisol Zeledón
> <marisol.zeledon@xxxxxxxxxxxx> wrote:
> >
> > Hi,
> >
> > I have been trying to build a configfs - composite driver with UVC. I
> > have other functions such as mass storage and RNDIS included. When I
> > define UVC as the first function, everything seems to work fine, I see
> > the video device on my host computer and the device is able to send
> > frames to it. All other functions get triggered and work fine. The
> > thing is, I need UVC as the second function defined since RNDIS only
> > works on a Windows host if it is the first function defined (I need
> > this composite driver to work with a Windows host too and this is
> > apparently a Microsoft limitation/requirement).
> >
> > - So when I define UVC as the second function, it is not able to
> > create the video device on the host, I get the following logs on the
> > Linux host's side:
> >
> > [40166.930912] uvcvideo: Failed to query (GET_INFO) UVC control 2 on
> > unit 1: -32 (exp. 1).
> > [40177.294692] uvcvideo: Failed to query (GET_INFO) UVC control 2 on
> > unit 2: -110 (exp. 1).
> > [40208.014706] uvcvideo: UVC non compliance - GET_DEF(PROBE) not
> > supported. Enabling workaround.
> > [40213.134647] uvcvideo: Failed to query (129) UVC probe control :
> > -110 (exp. 26).
> > [40213.134653] uvcvideo: Failed to initialize the device (-5).
> >
> > - These are the descriptors I get from the host's side:
> >
> > Device Descriptor:
> > bLength 18
> > bDescriptorType 1
> > bcdUSB 3.20
> > bDeviceClass 239 Miscellaneous Device
> > bDeviceSubClass 2 ?
> > bDeviceProtocol 1 Interface Association
> > bMaxPacketSize0 9
> > idVendor 0x0955 NVidia Corp.
> > idProduct 0x7020
> > bcdDevice 0.02
> > iManufacturer 1
> > iProduct 2
> > iSerial 3
> > bNumConfigurations 1
> > Configuration Descriptor:
> > bLength 9
> > bDescriptorType 2
> > wTotalLength 317
> > bNumInterfaces 4
> > bConfigurationValue 1
> > iConfiguration 4
> > bmAttributes 0xe0
> > Self Powered
> > Remote Wakeup
> > MaxPower 0mA
> > Interface Association:
> > bLength 8
> > bDescriptorType 11
> > bFirstInterface 0
> > bInterfaceCount 2
> > bFunctionClass 2 Communications
> > bFunctionSubClass 6 Ethernet Networking
> > bFunctionProtocol 0
> > iFunction 7
> > Interface Descriptor:
> > bLength 9
> > bDescriptorType 4
> > bInterfaceNumber 0
> > bAlternateSetting 0
> > bNumEndpoints 1
> > bInterfaceClass 2 Communications
> > bInterfaceSubClass 2 Abstract (modem)
> > bInterfaceProtocol 255 Vendor Specific (MSFT RNDIS?)
> > iInterface 5
> > CDC Header:
> > bcdCDC 1.10
> > CDC Call Management:
> > bmCapabilities 0x00
> > bDataInterface 1
> > CDC ACM:
> > bmCapabilities 0x00
> > CDC Union:
> > bMasterInterface 0
> > bSlaveInterface 1
> > Endpoint Descriptor:
> > bLength 7
> > bDescriptorType 5
> > bEndpointAddress 0x82 EP 2 IN
> > bmAttributes 3
> > Transfer Type Interrupt
> > Synch Type None
> > Usage Type Data
> > wMaxPacketSize 0x0008 1x 8 bytes
> > bInterval 9
> > bMaxBurst 0
> > Interface Descriptor:
> > bLength 9
> > bDescriptorType 4
> > bInterfaceNumber 1
> > bAlternateSetting 0
> > bNumEndpoints 2
> > bInterfaceClass 10 CDC Data
> > bInterfaceSubClass 0 Unused
> > bInterfaceProtocol 0
> > iInterface 6
> > Endpoint Descriptor:
> > bLength 7
> > bDescriptorType 5
> > bEndpointAddress 0x81 EP 1 IN
> > bmAttributes 2
> > Transfer Type Bulk
> > Synch Type None
> > Usage Type Data
> > wMaxPacketSize 0x0400 1x 1024 bytes
> > bInterval 0
> > bMaxBurst 0
> > Endpoint Descriptor:
> > bLength 7
> > bDescriptorType 5
> > bEndpointAddress 0x01 EP 1 OUT
> > bmAttributes 2
> > Transfer Type Bulk
> > Synch Type None
> > Usage Type Data
> > wMaxPacketSize 0x0400 1x 1024 bytes
> > bInterval 0
> > bMaxBurst 0
> > Interface Association:
> > bLength 8
> > bDescriptorType 11
> > bFirstInterface 2
> > bInterfaceCount 2
> > bFunctionClass 14 Video
> > bFunctionSubClass 3 Video Interface Collection
> > bFunctionProtocol 0
> > iFunction 9
> > Interface Descriptor:
> > bLength 9
> > bDescriptorType 4
> > bInterfaceNumber 2
> > bAlternateSetting 0
> > bNumEndpoints 1
> > bInterfaceClass 14 Video
> > bInterfaceSubClass 1 Video Control
> > bInterfaceProtocol 0
> > iInterface 9
> > VideoControl Interface Descriptor:
> > bLength 13
> > bDescriptorType 36
> > bDescriptorSubtype 1 (HEADER)
> > bcdUVC 1.00
> > wTotalLength 52
> > dwClockFrequency 48.000000MHz
> > bInCollection 1
> > baInterfaceNr( 0) 3
> > VideoControl Interface Descriptor:
> > bLength 18
> > bDescriptorType 36
> > bDescriptorSubtype 2 (INPUT_TERMINAL)
> > bTerminalID 1
> > wTerminalType 0x0201 Camera Sensor
> > bAssocTerminal 0
> > iTerminal 0
> > wObjectiveFocalLengthMin 0
> > wObjectiveFocalLengthMax 0
> > wOcularFocalLength 0
> > bControlSize 3
> > bmControls 0x00000002
> > Auto-Exposure Mode
> > VideoControl Interface Descriptor:
> > bLength 12
> > bDescriptorType 36
> > bDescriptorSubtype 5 (PROCESSING_UNIT)
> > bUnitID 2
> > bSourceID 1
> > wMaxMultiplier 16384
> > bControlSize 2
> > bmControls 0x00000001
> > Brightness
> > iProcessing 0
> > bmVideoStandards 0x 0
> > VideoControl Interface Descriptor:
> > bLength 9
> > bDescriptorType 36
> > bDescriptorSubtype 3 (OUTPUT_TERMINAL)
> > bTerminalID 3
> > wTerminalType 0x0101 USB Streaming
> > bAssocTerminal 0
> > bSourceID 2
> > iTerminal 0
> > Endpoint Descriptor:
> > bLength 7
> > bDescriptorType 5
> > bEndpointAddress 0x83 EP 3 IN
> > bmAttributes 3
> > Transfer Type Interrupt
> > Synch Type None
> > Usage Type Data
> > wMaxPacketSize 0x0010 1x 16 bytes
> > bInterval 8
> > bMaxBurst 0
> > Interface Descriptor:
> > bLength 9
> > bDescriptorType 4
> > bInterfaceNumber 3
> > bAlternateSetting 0
> > bNumEndpoints 1
> > bInterfaceClass 14 Video
> > bInterfaceSubClass 2 Video Streaming
> > bInterfaceProtocol 0
> > iInterface 0
> > VideoStreaming Interface Descriptor:
> > bLength 14
> > bDescriptorType 36
> > bDescriptorSubtype 1 (INPUT_HEADER)
> > bNumFormats 1
> > wTotalLength 115
> > bEndPointAddress 132
> > bmInfo 0
> > bTerminalLink 3
> > bStillCaptureMethod 0
> > bTriggerSupport 0
> > bTriggerUsage 0
> > bControlSize 1
> > bmaControls( 0) 27
> > VideoStreaming Interface Descriptor:
> > bLength 27
> > bDescriptorType 36
> > bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED)
> > bFormatIndex 1
> > bNumFrameDescriptors 2
> > guidFormat
> > {59555932-0000-1000-8000-00aa00389b71}
> > bBitsPerPixel 16
> > bDefaultFrameIndex 1
> > bAspectRatioX 0
> > bAspectRatioY 0
> > bmInterlaceFlags 0x00
> > Interlaced stream or variable: No
> > Fields per frame: 2 fields
> > Field 1 first: No
> > Field pattern: Field 1 only
> > bCopyProtect 0
> > VideoStreaming Interface Descriptor:
> > bLength 38
> > bDescriptorType 36
> > bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
> > bFrameIndex 1
> > bmCapabilities 0x00
> > Still image unsupported
> > wWidth 640
> > wHeight 360
> > dwMinBitRate 18432000
> > dwMaxBitRate 55296000
> > dwMaxVideoFrameBufferSize 460800
> > dwDefaultFrameInterval 666666
> > bFrameIntervalType 3
> > dwFrameInterval( 0) 666666
> > dwFrameInterval( 1) 1000000
> > dwFrameInterval( 2) 5000000
> > VideoStreaming Interface Descriptor:
> > bLength 30
> > bDescriptorType 36
> > bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
> > bFrameIndex 2
> > bmCapabilities 0x00
> > Still image unsupported
> > wWidth 1280
> > wHeight 720
> > dwMinBitRate 29491200
> > dwMaxBitRate 29491200
> > dwMaxVideoFrameBufferSize 1843200
> > dwDefaultFrameInterval 5000000
> > bFrameIntervalType 1
> > dwFrameInterval( 0) 5000000
> > VideoStreaming Interface Descriptor:
> > bLength 6
> > bDescriptorType 36
> > bDescriptorSubtype 13 (COLORFORMAT)
> > bColorPrimaries 1 (BT.709,sRGB)
> > bTransferCharacteristics 1 (BT.709)
> > bMatrixCoefficients 4 (SMPTE 170M (BT.601))
> > Endpoint Descriptor:
> > bLength 7
> > bDescriptorType 5
> > bEndpointAddress 0x84 EP 4 IN
> > bmAttributes 2
> > Transfer Type Bulk
> > Synch Type None
> > Usage Type Data
> > wMaxPacketSize 0x0400 1x 1024 bytes
> > bInterval 0
> > bMaxBurst 0
> >
> >
> > On the device's side I don't get any failure logs. Is there any known
> > limitation to the UVC driver similar to the RNDIS one in Windows
> > hosts? Does it forcefully need to be defined as the first function to
> > work?
> >
> > Thank you in advance,
> > --
> > Marisol Zeledón Córdoba
> > Embedded Software Engineer
> > RidgeRun Embedded Solutions
> > San José, Costa Rica
>
>
>
> --
> Ricardo Ribalda
--
Marisol Zeledón Córdoba
Embedded Software Engineer
RidgeRun Embedded Solutions
San José, Costa Rica
